Open source Domain Name System(DNS) Servers
Submitted by srlinuxx on Sun, 12/10/2006 - 06:55.
The domain name system (DNS) stores and associates many types of information with domain names, but most importantly, it translates domain names (computer hostnames) to IP addresses. It also lists mail exchange servers accepting e-mail for each domain. In providing a worldwide keyword-based redirection service, DNS is an essential component of contemporary Internet use.
BIND
BIND (Berkeley Internet Name Domain) is an implementation of the Domain Name System (DNS) protocols and provides an openly redistributable reference implementation of the major components of the Domain Name System.
Downloads and Documentation
http://www.isc.org/index.pl?/sw/bind/
djbdns
Bind9 Views for DNS Zones
Bind 9 has the ability to answer queries from internal hosts with different responses than external hosts get. For example, lets say, that our internal network is 192.168.0.0/24, and our external DMZ is 172.16.10.0/24. Access to things such as web services from the internet, are via NATs to internal servers. Lets also say, that our web server is 192.168.0.50, and that the NAT on the firewall is 172.16.10.50. Internal users need to be able to look up this server as 192.168.0.50, and external people need to look it up as 172.16.10.50. This can be accomplished with 2 totally seperate DNS servers, or, with a single Bind 9 server that serves views of the same zone.
So, lets start looking at the configuration of our DNS server. Bind 9, running on your favorite flavor of a Unix-like operating system, and we will set our DNS server's IP address as 192.168.0.40. Since we have only 1 DNS server, the firewall also forwards UDP port 53 to our DNS server, and we will be able to answer queries from the internet as well.
Full Story.
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You talk the talk, but do you waddle the waddle?